Compilare: user.cpp: In function ‘void citire(int)’: user.cpp:10:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:12:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else for(j=1;j<=n;j++){mat[i][j]=nr;nr++;} ^ user.cpp: In function ‘void citire2(int)’: user.cpp:53:16: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i=1;i<=n;i++) ^ user.cpp:55:25: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] else for(j=1;j<=n;j++){ams[i][j]=v[a];a++;} ^